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文摘
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珠江三角洲改革开放30年以来经历了巨大的发展,但也导致了城市的迅速扩张以及大量宝贵农田的流失,引起了诸多环境问题和社会问题。因此探讨珠江三角洲土地利用的演变规律对于未来土地利用的发展变化具有重要的借鉴和指导意义。空间分析因其能有效揭示隐藏在区域数据之后的规律信息以及提供直观的可视化信息表达,已引起许多学者的关注。引入空间整体统计参数中的平均中心、标准距离和标准偏移椭圆,探讨珠江三角洲耕地和建设用地两种典型地物1990-2005年间空间整体特征变化规律。通过对研究区及研究区各市(区)空间中心转移、空间分布扩散和空间分布偏移的计算,表明珠江三角洲耕地空间特征在1990-2005整个阶段均呈现扩散状态,而建设用地空间特征在1990-2000阶段和2000-2005阶段呈现收缩和扩散两种特征。两类地物空间特征变化强度2000-2005阶段均大于1990-2000阶段。典型地物空间特征的发展变化与社会经济发展相一致。通过对比发现,耕地与建设用地空间中心迁移呈现反向变化,揭示了经济发展中大量的耕地转化为经济价值更高的建设用地。研究区中各市(区)典型地物在不同阶段、不同区域土地利用发展也存在空间差异性。空间统计指标能直观有效地揭示地物空间分布格局变化规律,有利于深入探讨研究区土地利用/覆盖变化。 |
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其他语种文摘
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During the past three decade years of reform and opening up, Pearl River Delta, one of the fastest-growing economies in China, has experienced significant change in land uses. These changes are the subject of increasing concern particularly as they relate to environmental and social problems. So, understanding how land and resource use change can bring forward some countermeasures and suggestions to harmonize development. Spatial analysis which can reveal the hidden rules of region data has been widely used in geographical spatial distribution field. In order to get the spatial expansion pattern of farmland and built-up land in Pearl River Delta during 1990 and 2005, three factors of centrographics were discussed which were spatial mean, standard distance and standard deviational ellipse. The results showed farmland distribution was more and more dispersion, but the dispersion change of built-up land, a tightening-spread trend between two-times periods. Compare the migration of spatial mean center, a reverse change was between those two land use type, especially in the 1990-2000 period. It revealed again that with the quick progress of the economy, especially the rapid industrialization, a great amount of farmland had been converted into built-up land. The spatial expansion pattern of those two land types was affected by the distribution of land type and socioeconomic development. Centrographics is a powerful technique to demonstrate the spatial expansion pattern of LUCC. |
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来源
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生态环境学报
,2013,22(1):164-169 【核心库】
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关键词
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空间中心统计
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空间特征
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土地利用/覆盖
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时空演变
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珠江三角洲
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地址
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1.
华南师范大学计算机学院, 广东, 广州, 510631
2.
中国科学院广州地球化学研究所, 广东, 广州, 510640
3.
广东省生态环境与土壤研究所, 广东, 广州, 510650
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1674-5906 |
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学科
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环境科学基础理论 |
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基金
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国家自然科学基金项目
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华南师范大学青年教师科研培育基金
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文献收藏号
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CSCD:4759030
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